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Ultrafast single and double proton transfer in photo-excited [2,2′-bipyridyl]-3,3′-diol

✍ Scribed by H. Zhang; P. van der Meulen; M. Glasbeek

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
441 KB
Volume
253
Category
Article
ISSN
0009-2614

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✦ Synopsis

We report on a subpicosecond fluorescence study of [2,2'-bipyridyl]-3,3'-diol using the fluorescent up-conversion technique with a time resolution of --300 fs. A new short-living fluorescence band, peaking at 568 nm, is observed, which is attributed to the emissive keto-enol tautomer. This tautomer is discussed to be formed in its excited singlet state in a stepwise proton transfer mechanism; eventually the keto-enol tautomer decays into the double-protonated di-keto product, which alternatively could also have been formed in a direct double proton transfer reaction.

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